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Segment Information (Tables)
6 Months Ended
Jun. 30, 2025
Segment Reporting [Abstract]  
Reconciliation of Assets from Segment to Consolidated
The following table presents total assets at the division level:
June 30, 2025December 31, 2024
(Dollars in millions)
Seaborne$2,455.2 $2,465.3 
U.S. Thermal1,309.3 1,346.9 
Corporate and Other1,998.9 2,141.5 
Total assets$5,763.4 $5,953.7 
Reportable Segment Results
Segment results were as follows:
Three Months Ended June 30, 2025
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$195.1 $252.2 $275.7 $155.1 $12.0 $890.1 
Less Significant Segment Expenses:
Labor costs37.7 61.3 52.9 48.9 
Repair costs29.0 41.4 32.6 39.6 
Outside services26.9 85.8 28.8 37.6 
Commodities expense19.9 12.6 35.8 17.7 
Sales related costs44.8 58.7 73.9 9.4 
Other expenses (1)
3.3 1.6 8.7 (11.6)
Adjusted EBITDA33.5 (9.2)43.0 13.5 12.5 93.3 
Additions to property, plant, equipment and mine development9.6 72.9 5.5 5.4 0.8 94.2 
Loss from equity affiliates— — — — 0.9 0.9 
Three Months Ended June 30, 2024
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$307.5 $294.3 $221.9 $202.0 $16.3 $1,042.0 
Less Significant Segment Expenses:
Labor costs41.4 52.4 49.5 55.1 
Repair costs36.0 43.5 26.1 35.8 
Outside services31.3 54.7 26.0 36.4 
Commodities expense22.5 15.9 34.4 19.8 
Sales related costs52.6 62.0 60.3 12.1 
Other expenses (1)
19.3 (77.8)7.8 7.4 
Adjusted EBITDA104.4 143.6 17.8 35.4 8.5 309.7 
Additions to property, plant, equipment and mine development18.2 75.8 7.5 2.8 1.3 105.6
Loss from equity affiliates— — — — 1.3 1.3 
Six Months Ended June 30, 2025
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$460.2 $472.3 $551.3 $323.8 $19.5 $1,827.1 
Less Significant Segment Expenses:
Labor costs72.8 116.3 102.7 99.1 
Repair costs53.8 88.4 64.1 73.7 
Outside services53.7 157.9 59.9 73.4 
Commodities expense39.0 26.0 74.5 37.2 
Sales related costs99.4 112.7 149.2 19.4 
Other expenses (1)
23.8 (33.0)21.6 (25.4)
Adjusted EBITDA117.7 4.0 79.3 46.4 (10.1)237.3 
Additions to property, plant, equipment and mine development18.1 126.1 9.4 10.0 1.0 164.6 
Loss from equity affiliates— — — — 7.6 7.6 
Six Months Ended June 30, 2024
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$591.4 $541.3 $476.0 $393.6 $23.3 $2,025.6 
Less Significant Segment Expenses:
Labor costs79.1 101.7 101.3 108.0 
Repair costs73.9 76.2 61.0 68.2 
Outside services62.3 109.3 57.9 73.0 
Commodities expense46.4 31.6 75.5 39.1 
Sales related costs104.7 114.0 130.1 25.7 
Other expenses (1)
26.8 (83.4)16.0 (2.3)
Adjusted EBITDA198.2 191.9 34.2 81.9 (36.0)470.2 
Additions to property, plant, equipment and mine development32.7 115.2 12.5 5.1 1.5 167.0
Loss from equity affiliates— — — — 5.0 5.0 
(1)    Other expenses for the mining operations primarily include lease expense; non-sales related taxes; insurance expense; joint facility charges; and credits related to the capitalization of costs to the balance sheet. For the three and six months ended June 30, 2024, the Seaborne Metallurgical segment includes $80.8 million related to the portion of the Shoal Creek insurance recovery that was applicable to incremental costs and business interruption recoveries.
Reconciliation of Consolidated (Loss) Income from Continuing Operations, Net of Income Taxes to Adjusted EBITDA
A reconciliation of consolidated (loss) income from continuing operations before income taxes to Adjusted EBITDA follows:
Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
 (Dollars in millions)
(Loss) income from continuing operations before incomes taxes$(28.3)$250.2 $14.9 $316.0 
Depreciation, depletion and amortization93.4 82.9 185.5 162.7 
Asset retirement obligation expenses13.8 12.9 27.4 25.8 
Restructuring charges3.5 0.1 5.2 0.2 
Transaction costs related to business combinations18.8 — 21.2 — 
Provision for NARM loss— 1.9 — 3.7 
Shoal Creek insurance recovery - property damage— (28.7)— (28.7)
Changes in amortization of basis difference related to equity affiliates(0.8)(0.3)(1.4)(0.7)
Interest expense, net of capitalized interest11.1 10.7 22.6 25.4 
Interest income(13.8)(16.8)(29.2)(36.0)
Unrealized (gains) losses on foreign currency option contracts(4.1)(2.4)(8.4)3.3 
Take-or-pay contract-based intangible recognition(0.3)(0.8)(0.5)(1.5)
Total Adjusted EBITDA$93.3 $309.7 $237.3 $470.2